Page 20
The duct humidistat Type HPH or the room humidistat Type
HRP send a proportional resistance output signal. In this way a
proportional band of 7% RH is achieved. This signal is to be
used for simple control functions.
Connect the hygrostat as indicated below:
HRP or HPH
Terminals single-cylinder and double-cylinder humidifiers
The control must be set for an external control signal of 0-140
Ohm.
Setting the control, also see Section: “Proportional Control with
an External Control signal” on Page 15.
The potentialfree output from a
signal relay may be used for 1
step control of a dehumidifier.
In this case, Parameter U6
Operating Mode is to be set to
the “PI control” operating
mode..
The switchover point between
humidification and dehumidifi-
cation is specified by the
parameters P8 Set Value RH
and E18 Offset for Dehumidi-
fier. The hysteresis of 1% for
dehumidification cannot be
modified.
Basic
Comfort / Comfort Plus
Proportional Control with
Hygrostat Type HPH or
HRP
1-Step Control Dehumidi-
fier
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